I honestly think the Scout could be considered more of a sidegrade instead of a straight upgrade.
It's not as agile as the Viper, nor are the shields as good as the Viper. However, it has the same hardpoints with what appears to be better positioning, 2 more utility mounts, and better internal compartments. There's a lot of room to be clever in the DBS during combat, but clever often means dead against truly competent pilots if you rely on your gimmicks too much.
But then there's also the 'quality of life' issues which often times come into play. The DBS has better room for expansion with it's internal compartments, as mentioned. It also has better jump range. I can already sort of see it replacing my Adder as my multi-purpose ship while I'm typing this, but since it's a tad bit more specialized it also sits in an awkward place... it's better at combat than a multi-role ship, and it's better at multi-role than a combat ship, but it's not quite as good in either as the Cobra or the Viper, both of which cost less. Where it will probably excel the most is in exploration, but according to the wiki the max jump range is 28.35 so being sub-30 with its internals may be a detriment.
I will have to do science unto it.